I admit that software needs some sort of upkeep to not fall to bitrot, but I simply don't understand how we got to the near-falldown of Thunderbird a few years ago. You don't have to add new features, keeping it alive and simply fixing critical bugs is fine. Basically everyone I know would prefer a stable mail client not getting any new features over a few new features and addons breaking.
I'm really happy Thunderbird hasn't gone the way of the dodo.
I'm really happy Thunderbird hasn't gone the way of the dodo.